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在流通柱实验中,使用NZVI去除四乙烯的温度效应在10至55°C之间

Alexander Schwardt¹, Nils Fridtjof Popp¹, Andreas Dahmke¹

¹Department of Applied Geology, Aquatic Geochemistry and Hydrogeology, Institute of Geoscience, Kiel University, 24118 Kiel, Germany.

Journal of contaminant hydrology

|April 16, 2025

概括

将地下热能储存 (UTES) 与纳米级零价铁 (NZVI) 结合起来,可以增强化碳化合物的修复. 高温会促进污染物的降解,但随着时间的推移减少NZVI的反应性,证明这种方法是可行的.

科学领域:

环境工程环境工程
地质化学地质化学
可持续能源可持续能源

背景情况:

城市地下利用用于地下热能存储 (UTES) 提供可持续的热供应.
地下污染需要有效的修复策略.
来自UTES的温度升高可能会增强污染物修复过程.

研究的目的:

为了研究温度 (10-55°C) 对纳米级零价铁 (NZVI) 对四乙烯 (PCE) 整治性能的影响.
评估将UTES与NZVI用于地下水整治的可行性.
评估温度对NZVI降解速率,反应性和被动性的影响.

主要方法:

进行了柱体实验,以模拟地下条件.
在不同温度 (10-55°C) 下监测NZVI对PCE的长期降解.
在非矿物化和自来水中分析了PCE去除率,生成和腐蚀反应性.

主要成果:

随着脱矿水 (DW) 和自来水 (TW) 温度的增加,PCE去除率 (kPCE) 显著增加.
较高的温度加速了NZVI腐蚀,减少了长期反应性,但增加了有利于微生物降解的H2生成.
在测试温度范围内没有观察到由于碳酸盐沉而导致的加速NZVI被动化.

结论:

结合UTS与NZVI是加强地下水整治的可行的方法.
来自UTES的高温提供了通过增加污染物降解率的补救优势.
增强降解和减少NZVI寿命之间的权衡需要考虑以优化应用.

关键词:

在CHC降解降解过程中.地下水整治的温度依赖性取决于地下水的整治温度.纳米级的零价值铁 (NZVI) 是地下热能储存 (UTES) 是指地下的热能储存.

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